Functions and classifications of resistance forming machines

First of all, resistors can be adjusted according to the resistance value and are divided into two categories: fixed and adjustable.

Fixed resistors refer to resistors whose resistance cannot be adjusted. They are mainly used in circuits where the resistance value is fixed and does not need to be changed. It plays the role of current limiting, shunting, voltage reduction, voltage dividing, load or matching. Variable resistor refers to a resistor whose resistance value is adjustable within a certain range. Variable resistor is also called rheostat or potentiometer. It is mainly used in circuits where the resistance value needs to change frequently to adjust the voltage and current in the circuit. In order to achieve the control or adjustment of parameters of the circuit.

Second, resistors can be divided into carbon film resistors, metal film resistors, wirewound resistors, cement resistors, etc. Among them, carbon film resistors and metal film resistors have a larger resistance value range, ranging from a few euros to hundreds of megohms, but the power is not large, generally around 1/8 watt to 2 watts, and the maximum can reach 10 watt. Wirewound resistors and cement resistors have a smaller resistance value range, from 10 ohms to 1...thousands of ohms, but have higher power, up to several hundred watts. The volume of the same power resistor, carbon film resistor and metal film resistor is smaller than that of wirewound resistor and cement resistor.

In addition to conventional resistors, there are also seed-holding resistors such as thermistors, varistors, photoresists, gas resistors and other sensitive resistors.

Fourth, with the development of integrated circuits, a special resistor has emerged that is especially suitable for resistance forming machines - suppression. It consists of several (4 or 8) resistors with equal resistance values and the same power. Each One pin of the resistor is connected together internally as a common. The presence of exclusion significantly saves plant space. Timing also improves the reliability of uJ.